“The House GOP’s campaign arm pulled the plug on its remaining ad buys last week for the Pittsburgh media market, where Rep. Keith Rothfus (R-PA) is desperately fighting to hang on to his seat in a race against Rep. Conor Lamb (D-PA),” The Hill reports. “It’s grim news for Rothfus, who has largely been seen as a dead man walking since redistricting left him with a Democratic-leaning district and a difficult opponent in Lamb.” “For the GOP, it’s likely a sign of things to come as the party seeks to target its money toward the races most likely to save its majority.